In a DSLR, depth of field is easy to manage by changing the aperture—a large aperture like f/4 results in a relatively narrow field of focus, for example, while a small aperture like f/20 ...

You probably could, but Apple—ever Apple —is limiting the ability to tweak a photo’s depth of field post-shot to its latest iPhones: the iPhone XS, XS Max, and XR. In other words, if your ...